[burger]

I am about to make some masks for a small medical facility use, per this video (pattern, directions).  I bought 12 HEPA cloth vacuum bags to be delivered Wednesday.   I don't yet know what the breathability will be.

Probably awful from my experience and what I've read.  We got some non-HEPA vacuum bags, and we're using them as the middle layer between two layers of relatively tightly woven cotton.  Breathing through all of this is a chore to the point that I have to focus on each breath.  I'm a runner, and there were still moments while walking around the grocery store where I felt like I wasn't quite getting enough oxygen.  I understand now why people have passed out wearing masks in public.

I saw a test of several mask materials somewhere, and HEPA vacuum bags had among the lowest breathability ratings.  I would not recommend these for anyone who has any breathing difficulty.

[burger]

I am about to make some masks for a small medical facility use, per this video (pattern, directions).  I bought 12 HEPA cloth vacuum bags to be delivered Wednesday.   I don't yet know what the breathability will be.

Probably awful from my experience and what I've read.  We got some non-HEPA vacuum bags, and we're using them as the middle layer between two layers of relatively tightly woven cotton.  Breathing through all of this is a chore to the point that I have to focus on each breath.  I'm a runner, and there were still moments while walking around the grocery store where I felt like I wasn't quite getting enough oxygen.  I understand now why people have passed out wearing masks in public.

I saw a test of several mask materials somewhere, and HEPA vacuum bags had among the lowest breathability ratings.  I would not recommend these for anyone who has any breathing difficulty.